import numpy as np, matplotlib.pyplot as plt
def readfile(filename):
    data_matrix = [None, None]
    with open(filename, 'r') as file:
        data_matrix[0] = file.readline().split()
        data_matrix[1] = file.readline().split()

    data_matrix = np.array(data_matrix)

    data_matrix = np.transpose(data_matrix)